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From: Simon Marchi <simon.marchi@polymtl.ca>
To: Pedro Alves <palves@redhat.com>
Cc: Simon Marchi <simon.marchi@ericsson.com>, gdb-patches@sourceware.org
Subject: Re: [PATCH 1/2] ptid_{lwp,tid}_p: Remove unnecessary checks
Date: Wed, 05 Apr 2017 19:21:00 -0000	[thread overview]
Message-ID: <85137e756398c3f6d0ac36826420f162@polymtl.ca> (raw)
In-Reply-To: <15fd0842-2c1d-3567-f707-3de79fa84e67@redhat.com>

On 2017-04-05 11:15, Pedro Alves wrote:
> On 04/04/2017 07:32 PM, Simon Marchi wrote:
>> The calls to ptid_equal in ptid_lwp_p and ptid_tid_p that compare the
>> argument to minus_one_ptid and null_ptid are not necessary.  The calls
>> in question are:
>> 
>>    if (ptid_equal (minus_one_ptid, ptid)
>>        || ptid_equal (null_ptid, ptid))
>>      return 0;
>> 
>> minus_one_ptid is { .pid = -1, .lwp = 0, .tid = 0 }
>> null_ptid is { .pid = 0, .lwp = 0, .tid = 0 }
>> 
>> If the ptid argument is either of them, the statements
>> 
>>   return (ptid_get_lwp (ptid) != 0);
>> 
>> and
>> 
>>   return (ptid_get_tid (ptid) != 0);
>> 
>> will yield the same result (0/false).
>> 
>> gdb/ChangeLog:
>> 
>> 	* common/ptid.c (ptid_lwp_p, ptid_tid_p): Remove comparison with
>> 	minus_one_ptid and null_ptid.
> 
> Indeed.  LGTM.
> 
> Thanks,
> Pedro Alves

Thanks, this one is pushed.


      reply	other threads:[~2017-04-05 19:21 UTC|newest]

Thread overview: 14+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2017-04-04 18:32 Simon Marchi
2017-04-04 18:33 ` [PATCH 2/2] Class-ify ptid_t Simon Marchi
2017-04-05 15:47   ` Pedro Alves
2017-04-05 19:44     ` Simon Marchi
2017-04-05 21:31       ` Pedro Alves
2017-04-06  2:15         ` Simon Marchi
2017-04-06 10:49           ` Pedro Alves
2017-04-06 11:12             ` Pedro Alves
2017-04-06 14:32               ` Simon Marchi
2017-04-06 14:38                 ` Pedro Alves
2017-04-06  3:09         ` Simon Marchi
2017-04-06 11:06           ` Pedro Alves
2017-04-05 15:15 ` [PATCH 1/2] ptid_{lwp,tid}_p: Remove unnecessary checks Pedro Alves
2017-04-05 19:21   ` Simon Marchi [this message]

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